Definition
S is the standard single-letter abbreviation for south, one of the four cardinal compass directions, corresponding to a magnetic or true bearing of 180°.
Plain English
S is shorthand for south. It marks the direction opposite north on a compass or chart.
Context Anchor
Seen in NOTAMs, chart notes, weather information, and airport descriptions where space is limited and directions are shortened.
Why Pilots Care
Direction abbreviations appear constantly in aviation — wind directions, runway numbers, navigation legs, and airspace boundaries. Reading 'S' correctly the first time keeps situational awareness intact.
Intuition Check
Do not read S as a general letter with no meaning in a NOTAM direction. In this context, S means south.
Example Sentence 1
The NOTAM described work in progress on the S side of the airfield.
Example Sentence 2
Set course 180 degrees, which is due S.